CVE-2020-2026 Kata Containers - Guests can trick the kata-runtime into mounting the container image on any host path

What is CVE-2020-2026?

CVE-2020-2026 is a high-severity path traversal vulnerability in Fedoraproject Fedora, published on 10 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A malicious guest compromised before a container creation (e.g. a malicious guest image or a guest running multiple containers) can trick the kata runtime into mounting the untrusted container filesystem on any host path, potentially allowing for code execution on the host. This issue affects: Kata Containers 1.11 versions earlier than 1.11.1; Kata Containers 1.10 versions earlier than 1.10.5; Kata Containers 1.9 and earlier versions.

Weakness: CWE-59

Which versions are affected by CVE-2020-2026?

6 open source packages ship an affected version, including github.com/kata-containers/runtime. It affects 2 products.

Products include Fedoraproject Fedora, Katacontainers Runtime.

How do I fix CVE-2020-2026?

Upgrade github.com/kata-containers/runtime to a fixed version for your release line: 1.9.1, 1.10.6 or 1.11.1.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-2026 being exploited?

There is no known exploitation of CVE-2020-2026 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-877x-32pm-p28x.